"Richard Kaplan" wrote in message
s.com...

"Tom S." wrote in message
...

You shut down both of them and wait for the smoke to clear. Then you
cautiously turn them on one at a time and see which one produces
smoke.

If you are IMC you cannot turn both electrical systems off in an airplane
with no vacuum system.


Or your observe your panel status lights to determine which is having
bus
problems, then shutdown the inop one.

What if there is just smoke but no panel status light change?

What if you shutdown both electrical systems and the smoke only increases?